Add base class cr.ui.BubbleButton for options.ControlledSettingIndicator

chrome/browser/resources/options/options_page.css

Index: chrome/browser/resources/options/options_page.css
diff --git a/chrome/browser/resources/options/options_page.css b/chrome/browser/resources/options/options_page.css
index 0733c8c27328bfd2e268a5725165976a3d220970..b20e3934e361da037ec9064defe9e5556e6712e4 100644
--- a/chrome/browser/resources/options/options_page.css
+++ b/chrome/browser/resources/options/options_page.css
@@ -477,29 +477,13 @@ html:not([enablePepperFlashSettings]) .pepper-flash-settings {
   padding: 0;
 }
 
-.controlled-setting-indicator {
-  display: none;
-}
-
 input:-webkit-any([type='text'],[type='url'],:not([type])) +
     .controlled-setting-indicator {
   -webkit-margin-start: 5px;
 }
 
-.controlled-setting-indicator[controlled-by] {
-  display: inline-block;
-  height: 0;
-  line-height: 1;
-  vertical-align: middle;
-  width: 16px;
-}
-
-.controlled-setting-indicator[controlled-by] > div {
-  background-size: 16px;
-  height: 16px;
-  position: relative;
-  top: -8px;
-  width: 16px;
+.controlled-setting-indicator:not([controlled-by]) {
+  display: none;
 }
 
 .controlled-setting-indicator[controlled-by='policy'] > div {